Type-writing machine.



A. G. F. KUROWSKI.

TYPE WRITING MACHINE.

APPLICATION FILED AUG.13,1910.

Patented Sept. 2, 1913.

COLUMBIA PLANOGNAPH co 'wasnmm'on, n. c.

UNITED STATES PATENT OFFICE.

ALFRED G. F. KUROWSKI, OF NEW YORK, N. Y., ASSIGNOR T0 UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING- MACHINE.

Specification of Letters Patent.

Patented Sept. 2, 1913.

To all whom it may concern:

Be it known that I, Anrnnn G. F. KUnowem, a citizen of the United States, residing in the borough of Brooklyn, city of New York in the county of Kings and State of New York, have invented certain new and useful Improvements in Type-lVriting Machines, of which the following is a specification.

This invention relates to line-spacing mechanisms for typewriting machines, and especially to devices for returning the platen through part of a regular line space forwardly or backwardly to enable letters or figures to be Written below or above the usual writing line, as when writing accents, fractions, exponents or other symbols. I provide an improved and simplified device for this purpose comprising a finger-lever having a pair of dogs 01 teeth.

The vibration of the lever forwardly or rearwardly from its normal central position meshes one or the other of said teeth with the usual line space wheel, to turn the latter and the platen, as required.

In the accompanying drawings, Figure 1 is a perspective, showing one form of the invention applied to an Underwood writing machine. Fig. 2 is a plan, partly in section. Fig. 3 is a side view, the device being idle. Fig. & shows the lever shifted to turn the platen backwardly. Fig. 5 shows the lever shifted to advance the platen.

Types 1 strike a platen 1 fast on an axle 2 journaled in platen frame ends 3, and turned one or more regular line spaces by a lever 4, through slide 5 and pawl 6, the latter engaging the usual notched or toothed wheel 7 fixed to the axle 2. A spring-pressed detent 8 engages the wheel. The mechanism is protected by a cover plate 9 having a depending apron 10. A dog lever 11 pivoted at 17, is swung in one direction or the other from its normal central position, to carry one or the other of two teeth or dogs 12, 13, upon the lever, between any two teeth of the line-space wheel 7, to turn the latter forwardly or backwardly through part of a regular line space. The teeth or dogs 12, 13 are mounted upon the end 15 of the lever, which when in normal central or idle position, holds the dogs out of contact with the line-space wheel, so as not to interfere with the rotation of the platen. A

1 click 14 prevents accidental rocking of the 1 lever, its free end dropping into a notch 16 formed in the broadened end thereof. A i rearward throw of the fingcrdevcr 11 from i its normal central position (Fig. 3) to that l shown in Fig. 1, meshes the tooth 13 with the line-space wheel and turns the platen backwardly about half a line-space,,as in- I dicated by the dotted lines a; and y, (Fig. 4) 1 the former line indicating the initial position of the platen, and the latter, the position to which it has been turned by the lever 11, to print characters above the writ ing line. A forward throw of the lever 11 from idle position, to that shown in Fig. 5, meshes the tooth 12 with the wheel 7 and turns the platen forwardly part of a line space, as indicated by the interval between the dotted lines X and Z (Fig. 5) to print the types below the usual writing line. The lever passes through a slot 23 in the cover plate 9. the opposite end edges of which arrest the lever at the extremes of its throw, to prevent overthrow of the platen in either direction. The spring click 14: may drop into notches 16 forming a rack on the end 15 of the lever, to hold the latter in either of its extreme positions. In other words, the end or segment 1:) 011 the lever is recessed at 16 to correspond with the positions assumed by the lever, and the latch 14 drops into any of the recesses to lock the lever (and platen) where adjusted; the platen being, however, not locked when the latch is in the middle recess, as at Fig. 3. The detent 8 rides upon the point of one of the teeth of the line-space wheel when the latter is turned from initial position, (see Figs. 4 and The return throw of the lever from either of its positions (Fig. i or 5) to its normal central or idle position (Fig. 3) starts the platen and line-space wheel back toward initial position. owing to the shape of the teeth 12, 13, which lit down into the notches between the teeth when the wheel is turned from its initial position, and on the return stroke of the lever press against the adjacent teeth 7, 7 respectively of the wheel in disengaging themselves from the wheel during a part of said stroke. The slight turn given the wheel displaces the spring detent S from the point of the tooth against which it rests, and it settles into the adjacent notch. Preferably, the fractional line-space mechanism is adjustable to different line-space wheels by pivoting the lever to a mount 18 adjustably fastened to the depending apron 10 of the cover plate by clamping screws 19 passing through enlarged apertures 20 in said apron. An apertured ear 21 on the apron 1O fits over the hub 22 of the line space wheel, to prevent flexing or springing of the plate when the lever is rocked to turn the platen.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a platen and regular line-spacing mechanism including a notched wheel, of a fractional line-space mechanism comprising a lever or part movable in opposite directions fromnormal position, and teeth spaced apart thereon so thatfone or the other tooth only meshes with the notched wheel when the lever is vibrated in one direction or the other, to turn the platen forwardly orbackwardly through part of a regular line space;

2. In a typewriting machine, the combination with a platen and regular line-spacing mechanism including a notched wheel, of a, fractional line-space mechanism comprising a vibratory doglever and teeth on the dog spaced apart so that one-or the other only meshes with the notched wheel when the lever is vibrated in one direction or the other, to turn the platen forwardly or backwardly through part of a regular line space, and a latch to hold the platen where adjusted.

3. In a typewriting machine, the combination with a platen and regular line-spacing mechanism including a notched wheel, of a fractional line-space mechanism comprising a vibratory dog lever and teeth on the dog spaced apart so that one or the other only meshes with the notched wheel when the lever is vibrated in one direction or the other, to turn the platen forwardly or backwardly through part of a regular line space, a segment on the lever recessed to correspond with the positions assumed by the lever, and a latch to drop into any of said recesses to lock the lever and platen where adjusted.

4- 111 a typewriting machine, the combination with a platen and regular line-spacing mechanism having a notched wheel connected to the platen, of an additional platenturning mechanism to rotate the platen forwardly or backwardly through part of a regular line-space, and including a lever, a rack, and a latch co-acting with the rack to hold the lever and platen Where adjusted.

5. In a typewriting machine, the combination with. a platen and regular line-spacing mechanism having a notched wheel connected to the platen, of an additional platenturning mechanism to rotate the platen forwardly or backwardly through part of a regular line-space, including a pivotally mounted lever, a rack concentric to the aXis of rotation of the lever, and a. latch co-acting wit-h the rack to hold the lever and platen where adjusted.

6. In a typewriting machine, the combination with a platen and regular line-spacing mechanism having a notched wheel connected to the platen, of an additional platenturning mechanism to rotate the platen forwardly or backwardly through part, of a regular line-space, including a vibratory dog lever, teeth on the dog lever, spaced apart so that one or the other meshes with the notched wheel to turn the platen and a mount supporting the dog lever, said mount being adjustable relatively to the notched wheel.

7 In a typewriting machine, the combination with a platen and regular line-spacingmechanism having a notched wheel connected to the platen, of an additional platenturning mechanism to rotate the platen forwardly or backwardly through part of a regular line-space, including a vibratory finger lever adjustable relatively to the wheel, and teeth on the lever, one or the other of which meshes with the notched wheel when the lever is swung in one direction or the other from its normal central position, to turn the platen.

S. In a typewriting machine, the combination with a platen having a notched or toothed wheel connected therewith and a detent engaging the wheel, of a vibratory finger or dog lever and teeth controlled by the lever, either of which teeth enters a notch in the wheel in the path of said tooth to turn the platen forwardly or backwardly and start it back toward initial position as K the lever is rocked toward its normal central position.

9. In a typewriting machine, the combination with a. platen, and line-space mechanism including a notched wheel, to turn the platen through regular intervals, of an additional platen-turning mechanism comprising a finger or dog lever having normally idle teeth co-acting with the notched wheel, to turn the latter and the platen part of a line space in either direction, a latch to hold the lever and platen where adjusted, and means to adjust the dog lever and teeth to different notched wheels.

10. In a typewriting machine, the combination with a platen, and line-space mechanism including a notched wheel, to turn the platen through regular intervals, of an additional platen-turning mechanism comprising a finger or dog lever having normally idle teeth co-acting with the notched wheel, to turn the latter and the platen part of a line space in either direction, a latch to hold the lever and platen where adjusted,

and an adjustable mount on which the dog lever is supported to adjust it to different notched wheels.

11. In a typewriting machine, the combination with a platen and line-space mechanism therefor, including a notched wheel, to turn the laten through regular intervals, of an additlonal platen-turning mechanism to rotate the platen part of a line space, and a mount adjustable on the machine and carrying said additional platen-turning mechanism to adjust it to different notched wheels.

12. In a typewriting machine, the combination with a platen and line-space mechanism therefor, including a notched wheel, to turn the platen through regular intervals, of an additional platen-turning mechanism to rotate the platen part of a line space, comprising a shiftable finger-lever, having teeth to engage the notches in the line-space wheel to turn the platen part of a line space interval backwardly or forwardly, the teeth being of such shape as to start the toothed wheel and platen toward initial position when the lever is brought to its normal central position, and a latch engaging the lever to hold it where adjusted.

13. In a typewriting machine, the combination with a platen and line-space mecha nism including a notched wheel to turn the platen through regular intervals, of an additional platen-turning device comprising a pivoted finger lever movable in either direction from normal position and having teeth to turn the line-space wheel, and normally lying out of engagement therewith when the finger lever is in its normal position, either tooth being movable into a notch in the line-space wheel to turn the latter and the platen through part of a linespace interval and being shaped to start the wheel and platen toward initial position when the tinger lever is vibrated back toward normal position, and a spring detent engaging the wheel.

14:- In a typewriting machine, the combination with a platen having an axle, linespace mechanism including a notched or toothed wheel fast on the axle, to turn the platen regular intervals, and a cover plate, of an additional platen-turning mechanism comprising a lever pivoted to the cover plate and passing through a slot therein, the end walls of the slot arresting the lever in either extreme position, normally idle teeth on the lever to turn the platen part of a line space in either direction, and an apcrtured car on the cover plate fitting over the axle to prevent flexure of the plate when the lever is rocked in either direction from its normal central position.

15. In a typewriting machine, the combination with a platen having an axle, line space mechanism, including a notched or toothed wheel fast on the axle, to turn the platen regular intervals, and a cover plate, of an additional platen-turning mechanism, including a lever pivoted to the cover plate and controlling said additional platen-turning mechanism, and an apcrtured car on the cover plate fitting over the axle to prevent fiexure of the plate.

16. In a typewriting machine, the combination with a platen and line-space mechanism including a notched wheel, to turn the platen through regular intervals, of a vibratory finger lever normally occupying a position intermediate its opposite limits of movement, the rocking of said lever to one side or the other of its normal position, operating to enter one or another of two normally idle teeth in a notch of the line space wheel to turn the latter and the platen through part of a line-space interval, and to partially return the wheel and platen to initial position when the finger lever is re stored to its normal central position, the return of the wheel and platen being completed by a spring detcn't engaging the wheel, the lever being arrested in any of its positions by a latch.

17. In a typewriting machine, the combination with a rotary platen having an axle, of a toothed line-space wheel fixed to the axle, a lever having its pivot parallel with the platen axle, and dogs fixed to said lever between its pivot and the platen axle, and operable when the lever is moved in either direction to rotate the platen a fraction of a line-space distance in the opposite direction.

ALFRED G. F. KUROWSKI.

WVitnesses K. FnANKroR'r, C. RIPLnY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

